| PMC full text: | Published online 2013 Sep 2. doi: 10.1186/2045-709X-21-30
|
Table 1
Baseline description of the study subjects consisting of 50-yr olds from the general Danish population who participated in the baseline study (N = 412) and those participating in the present SMS-Track survey (N = 261)
| Variables of interest | First survey 10 yrs prior to present study | Present SMS-Track survey |
|---|---|---|
| N (%) | N (%) | |
| Proportion women | 213 (52) | 142 (54) |
| Employment status | | |
| Self employed | 29 (7) | 18 (7) |
| Assisting spouse | 2 (0) | 0 (0) |
| Employed | 344 (84) | 230 (88) |
| Unemployed | 17 (4) | 7 (3) |
| Pensioner | 11 (3) | 2 (1) |
| Others outside labor force | 9 (2) | 4 (2) |
| Highest educational level | | |
| Basic school | 92 (22) | 49 (19) |
| General upper-secondary education | 9 (2) | 6 (2) |
| Vocational education/training | 127 (31) | 86 (33) |
| Short-cycle higher education | 84 (20) | 56 (21) |
| Medium-cycle higher education | 77 (19) | 50 (19) |
| Long-cycle higher education | 23 (6) | 15 (5) |
| Reported having had low back pain past year | 284 (69) | 170 (65) |
| Number of days with low back pain the year preceding study | | |
| 0 days | 123 (30) | 86 (33) |
| 1–30 days | 187 (45) | 121 (46) |
| >30 days | 102 (25) | 54 (21) |
| Reported having been on sick-leave preceding year because of low back pain | | |
| 0 days | 329 (80) | 201 (77) |
| 1–30 days | 61 (15) | 51 (20) |
| >30 days | 22 (5) | 9 (3) |